The sensor adopts a patented single "π" type measuring tube design, and the transmitter adopts full digital signal processing technology to realize stable closed-loop control of the sensor, real-time measurement of phase difference and frequency, real-time measurement of fluid density, volume flow, component ratio, etc. calculation, temperature compensation calculation and pressure compensation calculation. It has become the mass flow meter with the smallest diameter of 0.8mm (1/32 inch) in China. It is suitable for measuring the small flow of various liquids and gases.